Improvement in apparatus for boring cylinders



UNITED s STATES PATENT OFFICE.

L. B. FLANDI-IRS, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN 'APPARATUS FOR BORING CYLINDERS.

Specification forming part of Letters Patent No. 14,296, dated September 20, 1864.'

Z'o a/ZZ whom it may concern:

Be it known that I, L. B. FLANDERS, of Philadelphia, Pennsylvania, have invented an Improved Portable Boring Apparatus and I do hereby declare the following to be a full, clear, and exact description of the saine, refV erence being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates to improvements in apparatus for boring out cylinders, my said improvements, which are fully described hereinafter, being such that the apparatus can be readily adapted to the boring ont of horizontal, vertical, or inclined cylinders without removing the same from their foundations or frame work. The apparatus is also applicable to the boring out of other large objects-such, for instance, as the hubs of fly-wheels or the bearings of heavy shafts.

In order to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

0n reference to the accompanying drawings,

- which form a part of this specification, Fig- .ure 1, Drawing No. 1, is a section of my improved portable boring apparatus 5' Fig. f3, a plan view; Fig. 3, a sectional plan on the line l 2, Fig. 1 5 Fig. 4, a plan view of part of the machine; Fig. 5, a device to be sometimes used in connection with the machine; Fig. 6, (Drawing No. 2,) a plan view of the cuttinghead Fig'. 7, a vertical section of part ofthe cutting-head, drawn to an enlarged scale; Fig. S, a plan view of a plate employed when the the machine has to be used for boring vertical cylinders; Fig. 9, an edge view of the plate, Fig. 8 5 Fig. 10, a sectional view of a device to be used in boring either vertical or horizontal cylinders and Fig. 1l, a transverse section on the line 3 4, Fig. 10.

On reference to Figs.1,2, 3, and 4, Drawing y No. 1, A represents a horizontal or inclined cylinder from which both heads have been removed, and B is the boring-bar, which has a longitudinal groove for the reception of the feeding-screw (l.

To the ange a, at one 'end ofthe cylinder, is secured a cross-plate, D, by means of suitable bolts, b, in such a manner that the said plate can bc readily adjusted laterally on the ilange ofthe cylinder. The central portion of this plate D is made in the form of a ring, (see Fig. 4,) through which pass four setscrews, c, the latter serving to confine and adjust within the ring the hearing or sleeve AE, in which the boring-bar B turns, a movable collar, d, on the bar bearing against the said sleeve. A somewhat similar cross plate, D, is secured to blocks F, the latter being attached to the ange e at 'the opposite end of the cylinder A, and a sleeve, Ef, is secured to this plate, as in the former case, by set-screws, thus forming another bearing for the boringbar B. An adjustable collar, e', surrounds the boring-bar, to which it is secured by suitable set-screws, this collar being confined within the sleeve E by an annular piece, f, which tits into the sleeve, and is secured to the same by pins or keys, the collar c thus preventing any longitudinal movement of the boring- G is the cutting-head, which fits snugly but so as to slide freely on the boring-bar, the head having in the present instance three cntters, h, as best observed on reference to Fig. 6, Drawing No. 2. The cutters h h't into and are guided by slots in the head, to which they are secured by plates i. Small studs i', screwing into the hubj of the head,and bearing against the rear of the cutters, serve to adjust the same and to maintain them at a proper distance from the center ofthe bar. A block, lc, fits snugly in an opening in the hubj of the cutting-head, to which it is conned by setscrews or other suitable appliances, the inner face of the block having threads cut in it so as to fit those on the longitudinal screw C, of which the block thus forms the nut, so that on turning the said screw the cutting-head must traverse the boring-bar. This nut, however, serves .another purpose, for besides iitting to the screw it lits snugly to the sides of the longitudinal slot which contains the screw, and

thus acts as a key to prevent the boringbar from turning independently of the cuttinghead. The boring-bar passes through and turns freely in a case, H, composed of two plates secured to each other, and within this case are the three cog-wheels I, J, and K, the wheel l being so secured to the boring-bar that the latter can slide freely through the former,but so that one cannot turn independently of the other, and this wheel I gears into the wheel J on a spindle, which turns in the case H, the latter' wheel gearing in to the wheel K on a spindle, L, which,iu the present instance,is provided with a hand-wheel or with a driving-pulley, L', for receiving a belt from any adjacent shaft.

It should be understood that the casing H must be held stationary by any suitable attachments.

To the extreme end of the boring-bar is sccured another casing, M, within which is confined the feeding-gear, the latter cousistin g of a cog-wheel, in, on the end of the longitudinal l ranged, the cutting head having, by turning the screw C, been moved to .that end of the cylinder from which the boring has to be commenced, and thecutters having been properly adjusted, motion is communicated to the shaft L and through the train of wheels K, J, and I to the boring-bar B. As the latter revolves, a rotaryT motion will necessarily be communicated from the cog-wheel m, and through the wheels m', n, and n to the shaft p, and the cutting-head will continue to revolve without traversing the boring-bar, but if the shaft p be held stationary by means of the handle q, the longitudinal screw-shaft C must necessarily turn on its own axis and impart a Inovement to the cuttinghead along the boring-bar, ard this movement can be regulated at pleasure by the proper manipulation of the handle q.

It will be seen that the above described mechanism can be readily applied to any horizontal or inclined steam-cylinder without removing the same from the base-plate or framework of the engine, and that the apparatus can also be used for boring a variety of objects, as well as steam-cylinders.

When the boring-bar has to be adapted to vertical cylinders so situated that the use of the cross plate D at that end of the cylinder which has the stuffing-box cover is impracticable, I use the device shown in Figs. 10 and l1, Drawing N o. 2, for the purpose of a'ording a bearing for one end of the boring-bar.

In Fig. l() part of the cylindenhead is shown by red lines N, the follower with the packing, which together form the stuffingbox, having been removed to make way for a circular block, l?, of metal, part of which is of the tapering form represented in the drawings. In this block are cut four or any other suitable number of grooves for the admission of the keys 2, one key being so dovetailed into each groove that while all the keys can be simultaneously moved outward laterally they cannot be withdrawn from the said grooves. At the upper end of the block P is a screwed stem, u, to which is adapted a nut, u', and between the latter and the upper ends of the keys intcrvenes a washer, r.

The above-described device is placed in that portion of the cylinder-head previously occupied by the packing and follower, after which the nut u is so turned as to depress the keys and cause them. to bind against the interior of the packingchamber. A projection, w, at the lower end of the block P its into a recess in the boring-bar, which is thus supported at one end.

It will be evident that the above device is self-adjusting to the center ot' the cylinder, and that when the boring-bar is once iitted to the projection ze its proper position is determined.

In some instances steam-cylinders are closed at one and where there is no detachable cover. In such cases I adopt the devices illustrated in Figs. 8 and 9 for forming a bearing for one end of the boring-bar.

Q is a plate, having four recesses, in each of which a bar, It, is arranged to it snugly but slide freely, bolts s being used for confining these bars to the plate. From the center ot the plate projects a pin, x, on which turns a block, T, and on the lower edge of the latter are formed four cam-shaped projections, y, each of which bears againstv the inner end of one of the sliding bars It. The plate, with these appliances, is deposited in the cylinder, and rests on the closed end of the same, as seen in Fig. 9. A suitable instrument is then inserted into the square portion of the opening in the block T, and the latter is so turned that its cam-like projections y shall move out the sliding pieces R simultaneously and cause them to bear tight against the interior ofthe cylinder, after which the bars R are secured by the bolts s, the block T is withdrawn from the pin :11, and one end of the boring-bar placed over the said pin x. It will be readily seen that this device, like that above described, is self-adjusting to a central position within the cylinder.

When my boring-machine is applied to vertical cylinders, I remove the hand-wheel or pulley L', Drawing No. l, from the shaft L, and place on the same a bevel-wheel, t, and secure to the casing H a bracket, U, carrying a spindle on which is a bevel-wheel, t', gearing into the similar wheel t, a driving-pulley, 3, being secured to the same spindle. By this arrangement the driving-pulley is presented in the proper position for receiving a belt.

I claim as my invention and desire to secure by Letters Patent- 1. The combination of the boring-bar B, its sleeves or bearings E and E', and 'the crossplates D and D', with their set-screws c, the whole being constructed and arranged for application to and for the adjustment of thev boring-bar central with a cylinder, substantially as set forth.

2. The combinationv ofthe boring-bar B, the casing H, and the train of wheels LJ, and K, or their equivalen ts, the whole being arranged 'and operating substantially as described.

3. The collar e', attached to the boring-bar and confined within the sleeve or bearing E', substantially as describe( 4. The block K, adapted to the cuttinghead G, to the boxing-bar B, and screw G, substantially as described, so as to serve as a nut for the screw and as a key for preventing the cutting-head from turning on the bar.

5,. The combination of the l oring-bar B, its screw C, and casing M, o'r its equivalent, central shaft, p, and the train of wheels herein described, or the equivalent to the same, for the purpose specified.

6. rlhe detachable bracket U and its spindie carrying the bevel-wheel t', in combination with the casing H, its shaft L, and bevelwheel t.

7. The tapering block P, its inclined keys 2, screw u, and nut u', the whole being con strueted for central attachment to the head of a steam-cylinder, and for forming a bearing for one end ot' the boring bar, substantially as set forth.

8. The plate Q, its central pin, m, radial sliding bars R, and the block T, with its cani-like projections y, the whole being arranged and operating substantially as and for the purpose specified.

In testimony whereotI have signed mynaine to this specification in the presence of two subscribing witnesses.

- L. B. FLANDERS.

Witnesses:

HENRY HowsoN, JOHN WHITE. 

